The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 25, 2019
Filed:
Nov. 24, 2015
Applicant:
Eastman Chemical Company, Kingsport, TN (US);
Inventor:
Scott Donald Barnicki, Kingsport, TN (US);
Assignee:
Eastman Chemical Company, Kingsport, TN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 29/86 (2006.01); C07C 29/149 (2006.01); B01J 31/24 (2006.01); C07C 29/80 (2006.01);
U.S. Cl.
CPC ...
C07C 29/86 (2013.01); B01J 31/2409 (2013.01); C07C 29/149 (2013.01); B01J 2531/0258 (2013.01); B01J 2531/821 (2013.01); C07C 29/80 (2013.01); Y02P 20/52 (2015.11);
Abstract
Disclosed is a process for the purification of a mixed diol stream. The mixed diol stream comprising two-, three-, and four-carbon diols is separated into component diols by extraction with a hydrophobic solvent mixture. The diols recovered in the extractant may be removed from the extractant stream by back extraction with water or by distillation with an azeotrope-forming agent present, preferably an azeotroping agent already present in the extractant mixture.